I was wondering how they decide map rotation in game. Do certain times get certain maps? How many maps are usually in rotation?

The reason I am asking is because I saw someone complain about getting Paris over and over and I realized I had not gotten Paris in a while. I started paying attention and it was 4 days before I got Paris again (about 60 battles). In that same time I got Live oaks and Sand River bunches of times. 4 or 5 times I would get Live Oaks 2 times in 4 or 5 games. The same with Sand River. I always play late at night or really early in the morning because I am very rural and the internet I have has huge packet loss and ping spikes during regular hours. I am wondering if certain maps come up far more often late at night and certain maps come up far more often prime time.

Not really a serious post because I doubt if there is a real way to know for certain but thought it was kind of interesting that I seem to be getting different map rotation than many others. I like lights and fast mediums lately so I have no complaints about the rotation I get. Oddly enough I actually kind of like Paris too. Maybe I like it because I rarely get it. Oh, and the new map Korkof or Koroff, I can not remember the name, but it is an old map the redid. I have only been on it 5 times since it has come back out and I bet I have played hundreds of battles since then.